Examine source code of No Medium Login

{
  "manifest_version": 2,
  "name": "No Medium Login",
  "version": "1.0.1",
  "description": "Read full Medium articles without logging in.",
  "homepage_url": "https://github.com/dkgv/no-medium-login",
  "icons": {
    "48": "icons/48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://medium.com/*",
        "https://*.medium.com/*",
        "https://towardsdatascience.com/*"
      ],
      "js": [
        "no-medium-login.js"
      ]
    }
  ],
  "permissions": [
    "https://webcache.googleusercontent.com/search*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9338c206-3387-482b-bf92-5e2a157fd5be}"
    }
  }
}